Imagine a large building full of about 50 people in a remote area, not accessible to other human beings.

Each person would need to have his basic needs – food, clothing, shelter and so forth, met. In doing so, each person would have to develop skills to go about earning his livelihood to support his needs. But it would be nonsensical for every person to develop each skill that is needed to survive. What would happen in reality is that each person would develop a few key skills and use these as his source of living; for example one person may specialize in growing crops and rearing animals, whist another may specialize in plumbing and carpentry.

Now these people would have to trade with one another to benefit from one another’s skills. For example, the farmer may trade 10 chickens with the builder in exchange for him renovating his room, …